That is strange. Maybe the oil level sensor is bad or gummed up? It's located right beside the oil filter and also measures oil level, oil temp and pressure. Are you seeing the oil temp go up after a 10 minute drive?

Here are the TIS instructions for replacing the oil level sensor, it goes for $166 at Tischer. I would disconnect the sensor plug first and spray some contact cleaner or WD40 in there. Then I would pull the sensor and clean it, and reinstall to see if that helps before buying a new one. I think a bad sensor would also show up if you did a code scan.